Abstract: A microdosing device comprises a pressure chamber which is at least partly delimited by a displacer, an actuating device for actuating the displacer, the volume of the pressure chamber being adapted to be changed by actuating the displacer, a media reservoir which is in fluid comunication with the pressure chamber via a first fluid line, and an outlet opening which is in fluid communication with the pressure chamber via a second fluid line. The microdosing device additionally comprises a means for detecting the respective position of the displacer and a control means which is connected to the actuating device and to the means for detecting the position of the displacer, said control means controlling the actuating device on the basis of the detected position of the displacer or on the basis of displacer positions detected during at least one preceding dosing cycle so as to cause the discharge of a defined volume of fluid from the outlet opening.

Abstract: In an electric desired-value transmitter for automotive vehicles, particularly as electric gas pedal, having an actuating element and a potentiometer the wiper of which is coupled to the actuating element, a switch which is also coupled with the actuating element is connected to a comparison device to which the output voltage of the desired-value transmitter and at leasst one comparison voltage are fed. When the actuating element is in that position in which the switch is actuated, the comparison device is preferably fed two comparison voltages, one of which lines somewhat below the value of the output voltage which is given off by the desired-value transmitter upon proper operation and the other of which lies somewhat above said value.